DOI: 10.1002/2015GL065811
论文题名: A joint receiver function and gravity study of crustal structure beneath the incipient Okavango Rift, Botswana
作者: Yu Y. ; Liu K.H. ; Reed C.A. ; Moidaki M. ; Mickus K. ; Atekwana E.A. ; Gao S.S.
刊名: Geophysical Research Letters
ISSN: 0094-9618
EISSN: 1944-9349
出版年: 2015
卷: 42, 期: 20 起始页码: 8398
结束页码: 8405
语种: 英语
英文关键词: Botswana
; continental crust
; continental rifting
; East African Rift
; Okavango rift
Scopus关键词: Geologic models
; Lithology
; Tectonics
; Botswana
; Continental crusts
; Continental rifting
; East African Rift
; Okavango rift
; Structural geology
; continental breakup
; continental crust
; continental lithosphere
; crust-mantle boundary
; crustal structure
; crustal thinning
; decompression
; gravity
; magma
; melting
; rifting
; sedimentary basin
; shear
; teleseismic wave
; uplift
; upper mantle
; Botswana
; East African Rift
; Okavango Rift Zone
英文摘要: Rifting incorporates the fundamental processes concerning the breakup of continental lithosphere and plays a significant role in the formation and evolution of sedimentary basins. In order to decipher the characteristics of rifting at its earliest stage, we conduct the first teleseismic crustal study of one of the world's youngest continental rifts, the Okavango Rift Zone (ORZ), where the magma has not yet breached the surface. Results from receiver function stacking and gravity modeling indicate that the crust/mantle boundary beneath the ORZ is uplifted by 4-5 km, and the initiation of the ORZ is closely related to lithospheric stretching. Possible decompression melting of the subcrustal lithosphere occurs beneath the ORZ, as evidenced by a relatively low upper mantle density based on the gravity modeling. Key Points First seismic study of incipient Okavango rift crust Symmetric crustal thinning of 4-5 km indicating pure shear Rifting initiation by relative motion of cratonic blocks © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946594089&doi=10.1002%2f2015GL065811&partnerID=40&md5=d0ab30154f9f8e3fd64c912196e1fdf3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9233
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Geology and Geophysics Program, Missouri University of Science and Technology, Rolla, MO, United States
Recommended Citation:
Yu Y.,Liu K.H.,Reed C.A.,et al. A joint receiver function and gravity study of crustal structure beneath the incipient Okavango Rift, Botswana[J]. Geophysical Research Letters,2015-01-01,42(20).